Fitting for automotive vehicle heaters



1931- v. .1. BUTTERFIELD 1,834,141

FITTING FOR AUTOMOTIVE VEHICLE HEATERS Filed Feb. 20. 1929 2 Sheets-Sheet 1 IN VENTOR VERNONJ BUTTERFIELD m9 MW A 7' TORNEYS 1931. v. J. BUTTERFIELD FITIING FOR AUTOMOTIVE VEHICLE HEATERS Filed Feb. 20. 1929 2 Sheets-Sheet INVENTOF? VERNON J BUTTERF/ELD ATTORNEYS Pat'ented Dec. 1,1931

UNITED STATES PATENT OFFICE VERNON J'. B'O'TTERIFIELD, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO TROPIG-AIRE,

INCORPORATED, OF MINNEAPOLIS, MINNESOTA, A CORPORATION OF DELAWARE i FITTING-TOR AUTOMOTIVE VEHICLE HEATERS Application filed February 20, 1929. Serial No. 341,402.

This invention relates to a fitting more especially useful for the purpose of making operative connection between the water-cir culating cooling system of a vehicle engine and an automotive vehicle heater having a heating element adapted to receive its heat from the said water-circulating cooling system. 1

'An object of the invention is to provide afitting of novel, improved and simple construction, useful for many purposes, but more especially adapted to the purpose of making an efiicient and dependable water tight. connection between a water conduit communicating with a heating element of an automotive vehicle heater and a flexible water conduit or passage of the water-circulating cooling system of the engine of the vehicle having said heater, and which can be readily and quickly associated with the said conduit and water passage.

Other objects and advantages of the invention will appear as the specification proceeds, it being understood that the disclosure herein is merely illustrative and meant in no .way in a limiting sense, various changes being permissible so long as within the scope of the claims which follow.

In the accompanying drawings forming a part of this specification,

Fig. 1 is an elevational view, partially sectioned, of a fragment of an automotive Vehicle, showing the water-circulating cooling system of the vehicle engine and a heating apparatus associated therewith, and disclosing a fitting having the features of the invention making connection between a conduit in communication with the heating element of the heating apparatus and a passage of the water-circulating cooling system of the engine of the vehicle;

Fig. 2 is an enlarged sectional view on line 22 in Fig. 1, detailing the improved fitting; v

Fig. 3 is a detail sectional view of the fitting, disclosing said fitting and the conduit communicating with the heating element connected with each'other in slightly modified manner;

Fig. & is a perspective view of the nippleinserted in a passage of smaller size, and also disclosing the nipple upon the straight tube of the fitting of Figs. 2 and 3 inserted directly into said nipple-receiving element, the elbow part of the fitting of said Figs. 2 and 3 inserted directly into said nipple-receiving element, the elbow part of the fitting of said Figs. 2 and 3 being omitted; and

Fig. 7 is a detail sectional view correspondinggenerally with the disclosures of Figs. 3 and 6, but showing a nipple-receiving element ofmodified construction located within the passage of the water-circulating cooling system.

\Vith respect to the drawings and the numerals of reference thereon, 10 denotes an automotive vehicle, 11 the Water-circulating cooling system of the engine thereof, and 12 a heating apparatus associated with said vehicle and engine and including a heating element 13 adapted to receive its heat from hot Water of said water-circulating cooling sys-' tem.

Of the water-circulating cooling system, 14 represents the engine block including a water-j acket, 15'the cooling radiator, 16 a conduit or passage leading from the water-jacket to the cooling radiator, 17 a conduit or passage leading from the cooling radiator back to the water-jacket and 18 designates the usual Water pump in the conduit or passage 17. As is well known, the pump 18 operates to force cooling waterthrough the water-circulating cooling system of the engine, the usual course of the water being from the water-jacket viathe conduit or passage 16 to the cooling radiator, through the cooling radiator, and from-the cooling radiator via the conduit or passage 17 back to the pump and the water-jacket.

A conduit 19 leading from the water-jacket to the heating element 13 is associated with said Water-jacket in any preferred manner a conduit 20 leading from said heating eleresult-as stated.

ment to the conduit or passage 17 is associ- The straight tube 36 may include an exterated with said conduit or passage 17 by means nal shoulder 40 engaged by the conduit 20, of a fitting 21 in which the features of the which as shown ametallic tube, fitted upon present invention reside, so that when the said straight tube, numeral 41 designating a pump 18 is operating to force cooling wa. section of rubber hose'fitted upon the joint ter through the engine cooling system, porbetween the said straight tube and condult, tions of the water will also be forced through and 42 representing suitable clamps about the the water-circulating passages (not shown) rubber hose to insure its position upon the of the heating element in a mannerwhich joint. will be obvious, the course of the water be- 'In Fig. 3 the conduit 20 is of rubber and ing from the water-jacket through the confits upon the straight tube 36 against the duit 19, throughthe heating element, and shoulder 40, a clamp, or clamps, 42 retaining through the conduit 20 to the conduitor pasthe conduit on the'fitting, k sage 17 In Fig. 6 the nipple receiving element 24 is In the drawings I have disclosed a fitting disclosed as inserted in a conduit or passage 21 consisting of a threaded nipple 22 eX- 17 having smaller internal diameter than the tending through an opening 23 in the conduit diameter of the open tube 26. To this end, or passage 17, which is, asshown, made of the said tube is collapsed so that the free rubber tubing, the portion of said nipple 'edges thereof overlap. 1 within the tubing being associated with an In Fig. 7 the nipple-receiving element internal nipple-receiving element 24, and the within the passage 17 consists of a shaped portion thereof without said tubing being associated with a nipple receiving unit 25, itself part-tube 26, disclosed as extending slightly associated with the conduit 20. less than one-half of the circumference of the More specifically, the nipple reeeiving'eleconduit orpassage 17. ment 24 may consist of a flexible, metallic tube 26 which snugly fits the conduit 17 and down against the shaped washer 31, said is open at one side, as indicated at 27, and a washer is firmly pressed against the outer surforming no part of the present invention, and portions thereof to the accomplishment of the shaped nut 28 which is desirably integral face of the conduit or passage 17 about the with the metallic tube and is disposed interopening 23 therein, while the nut 28 is drawn nally thereof about a desirably centrally I ranged opening 29 of said metallic tube. The tube 26 or part-tube 26 to be firmly pressed shaped nut 28 is of cylindrical conformaagainst the inner surface of said conduit or tion at its inner and outer surfaces and snugpassage about said opening, to thus provide -ly fits the internal surface of said 'metallio a water-tight seal. tube 25. The nut and tube can be made from A ecial fun tio of th t l t b 26 r a single piece of metal, or the one can be solpart-tube 26 is to strengthen or reinforce the dered, welded, or otherwise secured, to the rubber tubing or passage 17 at the location of other. The thread upon the inner end tion of the nipple 22 is received in the opening with the rubber tubing, to seal the opening 23, 29 and in the thread 30 of the nut 28. will be constituted by substantial or rigid con- The nipple receiving unit 25 may consist struction rather than by the more or less loose of a shaped washer 31 fitted against the outer or sloppy construction. which' would exist surface of the conduit or passage 17 and havwere not th strengthening or reinforcing ing an opening receiving the outer end pormember 26, or 26', utilized. I tionof the nipple 22, a clamping and lock 7 nut 32 upon the said outer end portion of said to clamp the shaped washer 31 and the elenipple and adapted to be turned down against n 24 g n t the Outer and the 1 $1 the shaped washer, an elbow 33 having an p ya 9 b tubmg internally'threaded end portion 34 screwed and 9 lock the elbow and 1ts assoclated upon the nipple an oppositely intem parts in fixed relation to the said rubber tubnally threaded end portion 35, a straight tube 36 having a threaded nipple 37 adapted to elbow-dand the Parts ii f g f can be be received in the threaded end portion of turne to assume any desue ang to com the elbow, and a lock nut 38 upon the threaded nipple 37 and adapted'to' engage the ad- 60 jacent end of said elbow. The shapedwasher 31 is fiat upon its outer surface to be engaged by the full surface of the nut 32, while at its inner surface 'said-shaped "washer is I of cylindrical form, portions of thesaid wash- 65 er, designated 39, beingfthicker than other of the conduit20 to the conduit or passage 17 caused to firmly engage the nut 32, as will be obvious. v H 7 The outer circumferences of the conduit 20' and the straight tube 36 comprise a, single,

continuous circumference 1s 1n engagement wlth the ah i nut 28 preferably secured to a flexible metal It will be seen that when the nut 22 is turned As shown in Figs. 2 and 3, the said form to the relation in some particular case and can be locked in desired position by being artoward the shaped washer to cause the metal 2 porthe fitting, so that the assembly of the fitting The nut 32 serves a double purpose, namely,

aid conduit der 40','as;;in

assent passage 17. By reason of the fact that the conduit 20 and the straight tube are arranged in telescoping relation, the oint be tween the conduit 20 and the fittingis rigid,

as well as is the joint between the conduit or. v

nipple without said flexible conduit and havpassage 17 and said fitting.

I claim asmy invention:

1. A fitting for connecting aconduit with a flexible conduit, comprising a threaded nipple-receiving strengthening element engaging a considerable area of the internal surface of said flexible conduit, a hollow nipple threaded into said element and extending outwardly through an opening in said flexible conduit, said hollow nipple being adapted to open to said conduit, a washer freely arranged upon said nipple without said flexible conduit, and a nut upon said nipple adapted to be turned down against said washer to clamp said nipple-receiving strengthening element and said washer against the inner and outer surfaces, respectively, of said flexible conduit to seal the opening therein.

2. A fitting for connecting a conduit with a flexible conduit, comprising a. threaded flexible metallic member of tubular conformation engaging a considerable area of the internal surface of said flexible conduit, a hollow nipple threaded into said member of tubular conformation and extending outwardly through an opening in said flexible conduit, said hollow nipple being adapted to open to said conduit, a Washer freely arranged upon said nipple without said flexible conduit, and a nut upon said nipple adapted to be turned down against said washer to clamp said member of tubular conformation and said washer against the inner and outer surfaces, respectively, of said flexible conduit to seal the opening therein.

3. A fitting for connecting a conduit with a flexible conduit, comprising a flexible me-' tallic memberof tubular conformation engaging a considerable area of the internal surface of said flexible conduit, a nut integral with said member of tubular conformation and arranged internally thereof, a hollow nipple threaded into said nut and extending outwardly through an opening in said flexible conduit, said hollow nipple being adapted to open to said conduit, a washer freely arranged upon said nipple without said flexible conduit, and a nut upon said nipple adapted to be turned down against said washer to clamp said member of tubular conformation and said washer against the inner and outer sur- 4. A fitting for connecting a conduit with a flexible conduit, comprising a flexible metallic member of tubular conformation open at one side and engaging a considerable area of the internal surface of said flexible conduit, a nut integral with said member of tubular conformation and arranged internally thereof, a hollow nipple threaded into said unit and extending outwardly through an opening in said flexible conduit, said hollow nipple being adapted to open to said conduit, a shaped washer freely arranged upon said ing an outer flat surface and an inner surface of cylindrical conformation adapted to engage the outer surface of said flexible con-- duit, and a nut upon said nipple adapted to be turned down against the flat surface of said washer to clamp said member of tubular conformation and the surface of cylindrical conformation of said washer against the inner and outer surfaces, respectively, of said flexible conduit to seal the opening therein.

5'. A fitting for connecting a conduit with a flexible conduit, comprising a nipple-re ceiving element engaging the internal surface of said flexible conduit, a hollow nipple threaded into said element and extending outwardly through .an opening in said flexible conduit, said hollow nipple being adapted to open to said conduit, a shaped washer freely arranged upon said nipple without said flexible conduit and having an outer flat surface and an inner surface of conformation to fit the outer surface of said flexible conduit, 100 and a nut upon said nipple adapted to be turned down against the flat surface of said washer to clamp .said nipple-receiving element and the inner surface of said washer against the inner and outer surfaces, respec- 105 tively, of said flexible conduit to seal the opening therein.

6. A fitting for connecting a conduit with a flexible conduit, comprising a nipple-receiving element engaging the internal surface of 1 said flexible conduit, a hollow nipple threaded into said element and extending outward- 1y through an opening in said flexible conduit, a washer freely arranged upon said nipple without said flexible conduit, a nut upon said nipple adapted to be turned down against said washer to clamp said nipplereceiving element and said washer against the inner and outer surfaces, respectively, of said flexible conduit to seal the opening therein, and a member having angular configuration screwed upon said nipple to engage said nut, said angular member being adapted to open to said conduit.

In witness whereof I havehereunto set my hand this 13th day of Februar 1929.

. VERNON J. BUTTERF IELD. 

